DuraVent® 4PVL-A12R Adjustable Pellet Vent Pipe, 4"D x 12"L

This adjustable pellet vent pipe can be used in both vertical and horizontal installations. Adds 3" to 10" of length to 4" rigid pellet pipe. Designed for stoves that burn wood pellets, double wall and air insulated pipe. Inner wall of .012" super ferritic stainless steel. Outer wall .018" laser welded galvalume. Required for venting pellet appliance above 4,000'.